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Title: Genetic algorithms applied to reconstructing coded imaging of neutrons and analysis of residual watermark

Abstract

Monte-Carlo simulation of neutron coded imaging based on encoding aperture for Z-pinch of large field-of-view with 5 mm radius has been investigated, and then the coded image has been obtained. Reconstruction method of source image based on genetic algorithms (GA) has been established. 'Residual watermark,' which emerges unavoidably in reconstructed image, while the peak normalization is employed in GA fitness calculation because of its statistical fluctuation amplification, has been discovered and studied. Residual watermark is primarily related to the shape and other parameters of the encoding aperture cross section. The properties and essential causes of the residual watermark were analyzed, while the identification on equivalent radius of aperture was provided. By using the equivalent radius, the reconstruction can also be accomplished without knowing the point spread function (PSF) of actual aperture. The reconstruction result is close to that by using PSF of the actual aperture.

Authors:
; ; ; ; ; ;  [1];  [1];  [2];  [3];  [1];  [4]
  1. School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049 (China)
  2. (China)
  3. Institute of Nuclear Physics and Chemistry, CAEP, Mianyang, 621900 Sichuan (China)
  4. (SEPA), Beijing 100082 (China)
Publication Date:
OSTI Identifier:
22093982
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 83; Journal Issue: 11; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALGORITHMS; AMPLIFICATION; APERTURES; COMPUTERIZED SIMULATION; CROSS SECTIONS; FLUCTUATIONS; IMAGES; INERTIAL CONFINEMENT; MONTE CARLO METHOD; NEUTRONS; TRANSFER FUNCTIONS

Citation Formats

Zhang Tiankui, Hu Huasi, Jia Qinggang, Zhang Fengna, Liu Zhihua, Hu Guang, Guo Wei, Chen Da, College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Li Zhenghong, Wu Yuelei, and Nuclear and Radiation Safety Centre, State Environmental Protection Administration. Genetic algorithms applied to reconstructing coded imaging of neutrons and analysis of residual watermark. United States: N. p., 2012. Web. doi:10.1063/1.4765701.
Zhang Tiankui, Hu Huasi, Jia Qinggang, Zhang Fengna, Liu Zhihua, Hu Guang, Guo Wei, Chen Da, College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Li Zhenghong, Wu Yuelei, & Nuclear and Radiation Safety Centre, State Environmental Protection Administration. Genetic algorithms applied to reconstructing coded imaging of neutrons and analysis of residual watermark. United States. doi:10.1063/1.4765701.
Zhang Tiankui, Hu Huasi, Jia Qinggang, Zhang Fengna, Liu Zhihua, Hu Guang, Guo Wei, Chen Da, College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Li Zhenghong, Wu Yuelei, and Nuclear and Radiation Safety Centre, State Environmental Protection Administration. Thu . "Genetic algorithms applied to reconstructing coded imaging of neutrons and analysis of residual watermark". United States. doi:10.1063/1.4765701.
@article{osti_22093982,
title = {Genetic algorithms applied to reconstructing coded imaging of neutrons and analysis of residual watermark},
author = {Zhang Tiankui and Hu Huasi and Jia Qinggang and Zhang Fengna and Liu Zhihua and Hu Guang and Guo Wei and Chen Da and College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 and Li Zhenghong and Wu Yuelei and Nuclear and Radiation Safety Centre, State Environmental Protection Administration},
abstractNote = {Monte-Carlo simulation of neutron coded imaging based on encoding aperture for Z-pinch of large field-of-view with 5 mm radius has been investigated, and then the coded image has been obtained. Reconstruction method of source image based on genetic algorithms (GA) has been established. 'Residual watermark,' which emerges unavoidably in reconstructed image, while the peak normalization is employed in GA fitness calculation because of its statistical fluctuation amplification, has been discovered and studied. Residual watermark is primarily related to the shape and other parameters of the encoding aperture cross section. The properties and essential causes of the residual watermark were analyzed, while the identification on equivalent radius of aperture was provided. By using the equivalent radius, the reconstruction can also be accomplished without knowing the point spread function (PSF) of actual aperture. The reconstruction result is close to that by using PSF of the actual aperture.},
doi = {10.1063/1.4765701},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 11,
volume = 83,
place = {United States},
year = {2012},
month = {11}
}